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Vacuum pumps

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Slyde
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Re: Vacuum pumps

Postby Slyde » Mon Feb 05, 2018 7:46 pm

Well I found a fridge pump at the local scrap metal yard for $10. It’s all running fine so i’ll do a test run and see how we go. Thanks guys.

Blackrat
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Re: Vacuum pumps

Postby Blackrat » Mon Feb 05, 2018 8:59 pm

I've had a pump last 7 years with zero maintenance and being used hard towards the end of its life

The problem with them is that they pump their life giving oil out.... and there is no way to check how much oil is in the pump.

I think I'm gonna try mounting some sort of inspection glass on the side of the pump. It needs to be sealed.

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downunder
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Re: Vacuum pumps

Postby downunder » Tue Feb 06, 2018 2:40 am

That's what oil trap is for ;)
It is true that my old pump was not spitting oil out as a new one...
I would try to replace/top up the oil before running a job.

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Bille
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Re: Vacuum pumps

Postby Bille » Tue Feb 06, 2018 2:21 pm

Blackrat wrote:
Mon Feb 05, 2018 8:59 pm
...

The problem with them is that they pump their life giving oil out.... and there is no way to check how much oil is in the pump.

...
I used a brass check-valve, in line between the pump and reservoir, and a long plastic
tube to make the exhaust go out the window. I open the brass valve, and spray a bit
of WD-40 , before using it.
My refrigerator pump was found on the curve during trash-day ; that was in 1989 , and it's still
going strong !! :D

Like this one :
https://www.mscdirect.com/browse/tnpla/ ... gI-sPD_BwE

Bille

Blackrat
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Re: Vacuum pumps

Postby Blackrat » Tue Feb 06, 2018 8:40 pm

There is a one way valve on the pump.... so even having a catch doesnt really help ( I also thought this until I cut a pump open and saw its guts)

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Bille
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Re: Vacuum pumps

Postby Bille » Wed Feb 07, 2018 4:25 am

Blackrat wrote:
Tue Feb 06, 2018 8:40 pm
There is a one way valve on the pump.... so even having a catch doesnt really help ( I also thought this until I cut a pump open and saw its guts)
My pump, lasted 29 years , (and still going strong) .

The brass check-valve is there for a way to put in the WD-40 .

Bille

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Re: Vacuum pumps

Postby fluidity » Mon Apr 23, 2018 10:23 am

tmcfarla wrote:
Sun Feb 04, 2018 1:27 pm
If you don’t need much compression, you could use extra large vacuum bags (from amazon) and a household vacuum cleaner. It pulls hard enough to hold everything in place and should be fine if you don’t need to follow any complex curves.
Be aware that vacuum cleaners rely on air flow to not overheat.


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